Double-Pane Windows Information | Best Pick Reports

Since glass is a fairly poor insulator—a single pane of glass has an R-value of around one—double-pane windows are often employed in homes in order to increase the home’s insulation capabilities. Double-pane windows aren’t superior to single-pane ones because of the additional pane of glass, but rather because there is air or gas sealed between the two panes. Eventually, some moist air will seep in between the two panes, evaporate, and the leftover deposits will accumulate on the inside of the windows, producing fog. It’s extremely difficult to successfully separate the panes and clean the fog, so replacing the window is usually the only viable solution.